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Silver

Chemical element
Silver is a chemical element; it has symbol Ag and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. Wikipedia
Symbol: Ag
Atomic mass: 107.8682 u
Atomic number: 47
Melting point: 1,763°F (961.8°C)
Electron configuration: [Kr] 4d¹⁰ 5s¹
Period: period 5
Discovery: before 5000 BC